Shot entirely in San Antonio, the 80-minute “Doctor S: The Movie” centers on a scientist (Rick Carrillo) and cheerleader (Alicia Shaddeau) who struggle to keep their heads and other vital organs during a zombie outbreak in the town of Crystal Oaks. It’s high art and high camp as only writer/director Bryan Ortiz can deliver, a fun homage to 1950’s sf paranoia and of course George Romero’s “Night of the Living Dead.”

“Doctor S: The Movie” screens at the Dragon*Con film fest Monday, Sept. 6, at 1 a.m., presumably because horny, pot-head zombies don’t believe in bedtime. Don’t worry if you can’t make that bleary-eyed screening — the Overtime Theater and Ortiz aim to turn “Doctor S” into a stage musical for October.